Neptune is the eighth planet from the Sun and is named after the Roman god of the sea. It is the fourth-largest planet in our solar system and is known for its beautiful blue color, which is due to the presence of methane gas in its atmosphere that absorbs red light and reflects blue light. One fun fact about Neptune is that it is the windiest planet in our solar system, with wind speeds that can reach up to 1,500 miles per hour. These strong winds are thought to be caused by the planet's distance from the Sun and its relatively low internal heat. Day Length: 58.6 Day || Diameter: 4,879 KM || Year Length: 87.97 Days